1. In 1859, Oregon was admitted to the Union as the 33rd state, marking a significant milestone in the state's history. The state had been part of the Oregon Territory since 1848, and its admission to the Union helped to cement its place in the growing United States.

2. In 1893, the Oregon State Penitentiary opened its doors, becoming the first prison in the state. Over the years, the facility has undergone numerous changes and expansions, and today it houses hundreds of inmates and employs hundreds of people.

3. In 1942, the Oregon State Board of Health received a report of a suspected case of polio in Portland. This was the first reported case of the disease in the state, and it marked the beginning of a nationwide epidemic that would peak in 1952.

4. In 1974, the Eugene Gas Explosion occurred in downtown Eugene, causing extensive damage to a city block and killing two people. The explosion was caused by a natural gas leak, and it highlighted the importance of safe gas practices and infrastructure maintenance.

5. In 1993, the Oregon Ducks football team won their first-ever Rose Bowl game, defeating the Penn State Nittany Lions 38-20. The victory was a major milestone for the program, and helped to establish the Ducks as a major player in college football.